Well, I do have to jump in here
The Norinco barrels are indeed throated and feed swc's just great, at least the ones we've gotten over the last couple years. Ramped barrels are neat but not needed at all in .45acp. Progressive rifling? Did I hear progressive rifling? Where do you get that? Gain twist rifling is available in a very few match barrels and its value is really debatable in a pistol. Maybe better, maybe not, but pretty pricy.
I'm in no way saying a Norinco is better than an STI. I sell a lot of both, and yes, you get what you pay for. Is a tuned, kitted-up Norc for under $600 a good deal? You betcha! Is it the best bang for the buck in a 1911? Well, maybe not any more...
Of course, we need to talk about the new STI Spartan. Now here's a gun that blows any Springfield, Kimber, Para, etc. 1911 in the under $1000 range decisively out of the water

At $719 shipped.... Well, at least I pay the shipping, I don't know if other dealers do...
In the end, though, "the best 1911" is really subjective. The best for IPSC Open Division? The best for concealed carry? The best over $3000? The best for pure target shooting? The neat thing is that all these can be had in a 1911 - and also the best all-around shooter with adjustable sights and phenomenal accuracy for well under $800 landed. OK, another plug for the STI Spartan. I'm shameless
Gunnar
www.armco-guns.com
No this is the wrong way. You do not make a first class gun by starting with poor quality gun. note also that the Norinco are Mill spec gun and do not have the improvement of the modern 1911 : to name a few, ramped and troated barrel, progressive rifling and the like. There is just too much to do to tighten things up and parts to change that this is not worth the money.
Save you money and buy yorself a nice Springfield or S&W.